CN117687153A - Free space wavelength division multiplexer based on film filter - Google Patents
Free space wavelength division multiplexer based on film filter Download PDFInfo
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- CN117687153A CN117687153A CN202311605293.1A CN202311605293A CN117687153A CN 117687153 A CN117687153 A CN 117687153A CN 202311605293 A CN202311605293 A CN 202311605293A CN 117687153 A CN117687153 A CN 117687153A
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- thin film
- parallel
- film filter
- wavelength division
- collimator
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- 239000000758 substrate Substances 0.000 claims abstract description 39
- 239000010409 thin film Substances 0.000 claims abstract description 37
- 239000013307 optical fiber Substances 0.000 claims abstract description 18
- 239000010408 film Substances 0.000 claims description 27
- 239000003292 glue Substances 0.000 claims description 12
- 239000000835 fiber Substances 0.000 claims description 6
- 230000008878 coupling Effects 0.000 claims description 3
- 238000010168 coupling process Methods 0.000 claims description 3
- 238000005859 coupling reaction Methods 0.000 claims description 3
- 238000004891 communication Methods 0.000 description 4
- 230000003287 optical effect Effects 0.000 description 4
- 239000007787 solid Substances 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 101000840267 Homo sapiens Immunoglobulin lambda-like polypeptide 1 Proteins 0.000 description 1
- 102100029616 Immunoglobulin lambda-like polypeptide 1 Human genes 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000002834 transmittance Methods 0.000 description 1
Abstract
The invention discloses a free space wavelength division multiplexer based on a thin film filter, which comprises a Z-Block, a groove array and six optical fiber collimators, wherein the Z-Block comprises a parallel substrate and six thin film filters, the thin film filters are used for transmitting light with specific wavelengths and reflecting light with other wavelengths, the groove array comprises six positioning grooves, the six positioning grooves are divided into two columns and are respectively arranged at two sides of the parallel substrate, a plurality of optical fiber collimators are arranged in the groove array, the groove array is used for fixing the positions and angles of the optical fiber collimators, and the thin film filters respectively correspond to the positions of the incident ends of the plurality of collimators.
Description
Technical Field
The invention relates to the technical field of optical fiber communication, in particular to a free space wavelength division multiplexer based on a thin film filter.
Background
Wavelength division multiplexers are important optical passive devices in the field of optical communications. Along with the continuous increase of transmission capacity in the field of optical communication, the wavelength division multiplexing technology fully utilizes the advantage of outputting light with different wavelengths in one optical fiber, so that the transmission capacity in one optical fiber is increased by several times or tens of times, and the cost is greatly reduced. With the development of technology in the whole communication industry, people pay more and more attention to balance of cost performance, so that telecom operators have higher and higher requirements on the size of the whole device, and more modules can be placed in a certain space.
Wavelength division multiplexers based on dielectric film technology have the advantage of stable performance and are therefore widely used in modern optical networks. In general, a multichannel multiport wavelength division multiplexer is realized by cascading a plurality of three-port devices, but the cost of a module is higher due to the larger loss of a cascading mode of a plurality of devices, so that the cost performance of the wavelength division multiplexing module in the cascading mode of the devices is not very high. In view of the above problems, a solution is proposed below.
Disclosure of Invention
The invention aims to provide a free space wavelength division multiplexer based on a thin film filter, which has the advantages of simple structure, small size and high debugging efficiency.
The technical aim of the invention is realized by the following technical scheme:
the utility model provides a free space wavelength division multiplexer based on film filter, includes Z-Block, recess array and six optical fiber collimators, Z-Block includes parallel base plate and six film filter, the film filter is used for transmitting the light of specific wavelength to reflect the light of other wavelength, the recess array includes six positioning groove, six positioning groove divide into two rows, and set up respectively in parallel base plate's both sides, a plurality of optical fiber collimators set up in the recess array, the recess array is used for fixed optical fiber collimator's position and angle, a plurality of film filter corresponds with the position of the incident end of a plurality of collimators respectively.
Preferably, the groove array further comprises an incidence groove, a COM collimator is arranged in the incidence groove, the COM collimator is used for coupling an incident light beam, and the incidence groove is used for fixing the position and angle of the COM collimator.
Preferably, the angle of the COM collimator is 8 degrees, and the COM collimator is configured to adjust the incident angle of the incident beam so that the incident beam is incident into the parallel substrate at an oblique angle of 8 degrees.
Preferably, the six thin film filters may transmit light beams having wavelengths λ1, λ2, λ3, λ4, λ5, and λ6, respectively, and λ1, λ2, λ3, λ4, λ5, and λ6 are different from each other.
Preferably, the three thin film filters positioned on the left side of the parallel substrate are parallel to each other, and the pitch between two adjacent thin film filters is 1980 micrometers; the three thin film filters positioned on the right side of the parallel substrate are parallel to each other, the pitch between two adjacent thin film filters is 1980 micrometers, and the thin film filter positioned on the lowest side of the left side of the parallel substrate is 990 micrometers higher in the vertical direction than the thin film filter positioned on the lowest side of the right side of the parallel substrate.
Preferably, the three fiber collimators positioned on the left side of the parallel substrate are parallel to each other, and the three fiber collimators positioned on the right side of the parallel substrate are parallel to each other.
Preferably, the optical fiber collimator is fixed in the positioning groove through ultraviolet glue or double-solid glue, and the COM collimator is fixed in the incidence groove through ultraviolet glue or double-solid glue.
Preferably, both sides of the parallel substrate are plated with an antireflection film.
The beneficial effects of the invention are as follows:
1. compared with the traditional scheme, the method has the advantages of short coupling time and high efficiency;
2. the debugging is simple and the debugging efficiency is higher;
3. simple structure, smaller size and more flexible.
Drawings
FIG. 1 is a schematic diagram of an embodiment;
FIG. 2 is a schematic diagram showing a beam path according to an embodiment.
Reference numerals: 1. parallel substrates; 2. a thin film filter; 3. a positioning groove; 4. an optical fiber collimator; 5. an incident groove; 6. COM collimator.
Detailed Description
The following description is only of the preferred embodiments of the present invention, and the scope of the present invention should not be limited to the examples, but should be construed as falling within the scope of the present invention. Wherein like parts are designated by like reference numerals. It should be noted that the words "front", "back", "left", "right", "upper" and "lower" used in the following description refer to directions in the drawings, and the words "bottom" and "top", "inner" and "outer" refer to directions toward or away from, respectively, the geometric center of a particular component.
As shown in fig. 1 and 2, a free space wavelength division multiplexer based on a thin film filter includes a Z-Block, a groove array, and six fiber collimators 4. The Z-Block comprises a parallel substrate 1 and six thin film filters 2, wherein the six thin film filters 2 are arranged on the left side and the right side of the parallel substrate 1 in two rows. Both sides of the parallel substrate 1 are plated with an antireflection film to increase the transmittance of the light beam.
The thin film filter 2 is used to transmit light of a specific wavelength and reflect light of the remaining wavelengths. In this design, the incident end of the light beam is located at a lower position on the left side of the parallel substrate 1. The film filter 2 positioned at the lowest right side of the parallel substrate 1 can transmit the light beam with the wavelength of λ1, the film filter 2 positioned at the lowest left side of the parallel substrate 1 can transmit the light beam with the wavelength of λ2, the film filter 2 positioned at the middle right side of the parallel substrate 1 can transmit the light beam with the wavelength of λ3, the film filter 2 positioned at the middle left side of the parallel substrate 1 can transmit the light beam with the wavelength of λ4, the film filter 2 positioned at the highest right side of the parallel substrate 1 can transmit the light beam with the wavelength of λ5, and the film filter 2 positioned at the highest left side of the parallel substrate 1 can transmit the light beam with the wavelength of λ6.
The groove array comprises six positioning grooves 3 and an incidence groove 5, a COM collimator 6 is fixed in the incidence groove 5 through ultraviolet glue or double-solid glue, and the COM collimator 6 can couple light beams with multiple wavelengths to enable the light beams to be incident light beams to be injected into the parallel substrate 1. And the COM collimator 6 can adjust the incident angle of the incident beam, the angle of the COM collimator 6 is 8 degrees, so that the incident angle of the incident beam emitted from the COM collimator 6 is 8 degrees.
The six positioning grooves 3 are internally fixed with optical fiber collimators 4 through ultraviolet glue or double-solid glue, the six optical fiber collimators 4 are divided into two rows and arranged on the left side and the right side of the parallel substrate 1, and the three optical fiber collimators 4 positioned on the same side of the parallel substrate 1 are kept parallel. The position of the entrance end of each fiber collimator 4 corresponds to the position of one thin film filter 2.
Three thin film filters 2 positioned on the same side of the parallel substrate 1 are parallel to each other, and the pitch between two adjacent thin film filters 2 is 1980 micrometers; the film filter 2 located at the lowest left side of the parallel substrate 1 is vertically 990 μm higher than the film filter 2 located at the lowest right side of the parallel substrate 1, i.e., three film filters located at the left side of the parallel substrate 1 are integrally higher than three film filters located at the right side of the parallel substrate 1 by 990 μm.
In use, a plurality of wavelengths of light beams are incident on the COM collimator 6 from the incident end of the parallel substrate 1, and the COM collimator 6 couples the plurality of wavelengths of light beams and then enters the parallel substrate 1 at an incident angle of 8 degrees.
The incident light beam firstly irradiates the film filter 2 positioned at the bottom of the right side, and transmits the light beam with the wavelength lambda 1; the light beams with the rest wavelengths are reflected to the lowest film filter 2 at the left side, and the light beams with the wavelength lambda 2 are transmitted out; the light beams with the rest wavelengths are reflected to the thin film filter 2 at the middle position on the right side, and the light beams with the wavelength lambda 3 are transmitted out; the light beams with the rest wavelengths are reflected to the thin film filter 2 at the middle position on the left side, and the light beams with the wavelength lambda 4 are transmitted at the position; the light beams with the rest wavelengths are reflected to the uppermost film filter sheet 2 on the right side, and the light beams with the wavelength lambda 5 are transmitted out; the light beams of the remaining wavelengths are reflected to the uppermost film filter 2 on the left, where the light beam of wavelength lambda 6 is transmitted.
The technical problems, technical solutions and advantageous effects solved by the present invention have been further described in detail in the above-described embodiments, and it should be understood that the above-described embodiments are only illustrative of the present invention and are not intended to limit the present invention, and any modifications, equivalent substitutions, improvements, etc. within the spirit and principle of the present invention should be included in the scope of protection of the present invention.
Claims (8)
1. The utility model provides a free space wavelength division multiplexer based on film filter, includes Z-Block, recess array and six optical fiber collimators (4), its characterized in that, Z-Block includes parallel base plate (1) and six film filter (2), film filter (2) are used for transmitting the light of specific wavelength to reflect the light of other wavelength, the recess array includes six constant head tank (3), six constant head tank (3) divide into two and set up respectively in the both sides of parallel base plate (1), a plurality of optical fiber collimators (4) set up in the recess array, the recess array is used for fixing the position and the angle of optical fiber collimator (4), a plurality of film filter (2) correspond with the position of the incident end of a plurality of collimators respectively.
2. A free-space wavelength division multiplexer based on a thin film filter according to claim 1, wherein the groove array further comprises an entrance groove (5), a COM collimator (6) is arranged in the entrance groove (5), the COM collimator (6) is used for coupling an incident light beam, and the entrance groove (5) is used for fixing the position and angle of the COM collimator (6).
3. A free-space wavelength division multiplexer based on a thin film filter according to claim 2, characterized in that the COM collimator (6) has an angle of 8 degrees, the COM collimator (6) being adapted to adjust the angle of incidence of the incident light beam such that the incident light beam is incident into the parallel substrate (1) at an oblique angle of 8 degrees.
4. A free space wavelength division multiplexer based on a thin film filter according to claim 1, characterized in that six thin film filters (2) are transmissive for light beams having wavelengths λ1, λ2, λ3, λ4, λ5, λ6, respectively, and that λ1, λ2, λ3, λ4, λ5, λ6 are different from each other.
5. A free-space wavelength division multiplexer based on thin film filters according to claim 1, characterized in that three thin film filters (2) located on the left side of the parallel substrate (1) are parallel to each other and the pitch between two adjacent thin film filters (2) is 1980 μm; three thin film filters (2) positioned on the right side of the parallel substrate (1) are parallel to each other, the pitch between two adjacent thin film filters (2) is 1980 micrometers, and the lowest thin film filter (2) positioned on the left side of the parallel substrate (1) is 990 micrometers higher in the vertical direction than the lowest thin film filter (2) positioned on the right side of the parallel substrate (1).
6. A free-space wavelength division multiplexer based on thin film filters according to claim 1, characterized in that three fiber collimators (4) on the left side of the parallel substrate (1) are parallel to each other and three fiber collimators (4) on the right side of the parallel substrate (1) are parallel to each other.
7. A free space wavelength division multiplexer based on a thin film filter according to claim 2, wherein the optical fiber collimator (4) is fixed in the positioning groove (3) by ultraviolet glue or double-fixing glue, and the COM collimator (6) is fixed in the incidence groove (5) by ultraviolet glue or double-fixing glue.
8. A free space wavelength division multiplexer based on thin film filters according to claim 1, characterized in that both sides of the parallel substrate (1) are coated with an anti-reflection film.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311605293.1A CN117687153A (en) | 2023-11-29 | 2023-11-29 | Free space wavelength division multiplexer based on film filter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311605293.1A CN117687153A (en) | 2023-11-29 | 2023-11-29 | Free space wavelength division multiplexer based on film filter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117687153A true CN117687153A (en) | 2024-03-12 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311605293.1A Pending CN117687153A (en) | 2023-11-29 | 2023-11-29 | Free space wavelength division multiplexer based on film filter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117687153A (en) |
-
2023
- 2023-11-29 CN CN202311605293.1A patent/CN117687153A/en active Pending
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